<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="biaoji">
    <label for="toggle-all"></label>
    <input class="new-todo" placeholder="输入任务名称-回车确认" autofocus v-model="val" @keydown.enter="enterFn" />
  </header>
</template>

<script>
export default {
  props: ['list'],
  data() {
    return {
      val: '',
      // biaoji:''
    }
  },
  methods: {
    enterFn(val) {
      if (this.val.trim() === '') return alert('请正确疏输入')
      this.$emit('add', this.val)
      this.val = ''
    }
  },
  computed: {
    biaoji: {
      set(val) {
        this.list.forEach(item=>item.isDone=val)
      },
      get() {
         return this.list.every(item=>item.isDone)
      }
    }
  }
}
</script>